- Histiocytic Sarcoma of the Spleen: A Case Report and Review of the Literature.
-
Jin Ho Paik, Yoon Kyung Jeon, Sung Shin Park, Hye Sook Min, Young A Kim, Ji Eun Kim, Chul Woo Kim
-
Korean J Pathol. 2005;39(5):356-359.
-
-
-
 Abstract
 PDF
- True histiocytic sarcoma is an extremely rare tumor. Its clinicopathological features are not clearly understood.
Here, we report the first Korean case of primary splenic histiocytic sarcoma. A 64-year-old female having refractory thrombocytopenia, anemia and splenic mass was admitted to the hospital, and received splenectomy. Grossly, spleen was enlarged up to 18 x 13 x 8 cm and occupied with multinodular masses. Microscopically, the masses were composed of atyical large cells with abudant cytoplasm and vesicular nuclei with prominent hemophagocytosis. The tumor cells were CD68 (+), S-100 protein (-), CD21 (-), CD1a (-). After splenectomy, thrombocytopenia and anemia were corrected. However two months later the symptoms recurred, and the patient died 15 months after splenectomy. This case shared the common clinicopathologic features with the several previously reported cases in other countries, represented by splenic mass formation and prominent hemophagocytosis associated with thrombocytopenia and anemia, often leading to poor outcome.
- Methylation Status of Epstein-Barr Virus Major Latent Promoter C in NK/T-cell Lymphoma and Peripheral T-cell Lymphoma.
-
Ji Eun Kim, Young A Kim, Sung Shin Park, Yoon Kyoun Jeon, Seung Sook Lee, Chul Woo Kim
-
Korean J Pathol. 2003;37(3):174-179.
-
-
-
Abstract
PDF
- BACKGROUND
Both the Natural killer/T-cell lymphoma (NKTL) and the peripheral T-cell lymphoma (PTCL) are relatively prevalent in the Asian population, and they are strongly associated with the Epstein-Barr virus (EBV). These two diseases have several common pathologic features, but show somewhat different clinical presentations. The critical point in terms of differentiating of these disease groups might be the impact of EBV in pathogenesis, and the variable gene expression of EBV regulated by a major latent C promoter (Cp).
METHODS
We investigated 43 cases of NKTL and 30 cases of PTCL to evaluate EBV associated characteristics. EBV in situ hybridization was performed in all of the submitted cases.
In the EBV positive cases, the methylation status of Cp which drives the expression of immunodominant viral nuclear protein, was examined by sensitive methylation specific PCR using paraffin embedded tissue.
RESULTS
EBV was found in 70% (30/43) of NKTL and 43% (13/30) of PTCL. Nasal and gastrointestinal lymphomas were predominantly NKTL. All of the successfully amplified cases of EBV positive NKTL and PTCL were of methylated Cp status.
CONCLUSIONS
The detection rate of EBV is high in NKTL, especially in the nasal area. The constantly methylated EBV Cp reflects the major role of Cp in regulating the EBV latency pattern and in helping EBV to avoid host immune system in both NKTL and PTCL.
- Methylotion Analysis of p16/INK4A in Gastric Low-Grade Mucosa-Associated Lymphoid Tissue Lymphomas after Helicobacter pylori Eradication Therapy.
-
Young A Kim, Sung Shin Park, Bo Young Lee, You Sun Kim, In Sung Song, Chul Woo Kim
-
Korean J Pathol. 2002;36(1):13-20.
-
-
-
Abstract
PDF
- BACKGROUND
Inactivation of p16 has been associated with promoter region hypermethylation in different types of malignancies, including non-Hodgkin's lymphomas (NHLs). This loss of p16 was found frequently in cases of mucosa-associated lymphoid tissue (MALT) lymphomas. Recent studies indicate that promoter hypermethylation is often an early event in tumor progression in the follow-up of NHLs.
METHODS
To investigate the usefulness of p16 methylation in the diagnosis and follow-up of gastric low-grade MALT lymphomas, we analyzed methylation status of p16 using methylation-specific polymerase chain reaction methods in the sequential biopsy specimens of 13 patients with gastric low-grade MALT lymphomas undergoing Helicobacter pylori eradication therapy.
RESULTS
Five of thriteen cases showed p16 hypermethylation upon diagnosis. In four of five methylation positive cases, abnormal methylation was detected in the specimen even after the treatment, although there were no histologic evidence of disease. This methylation disappeared in the later samples of two of the cases, and they have remained in complete remission. Immunohistochemically, the loss of p16 protein expression was detected in one of three methylation-positive cases, and in none of the methylation-negative cases.
CONCLUSIONS
These results suggest that p16 methylation is relatively fequent in low-grade gastric MALT lymphomas, and it may have clinical applications in the management and follow-up of low-grade gastric MALT lymphomas.
- Correlation between Clinical Outcome and Proliferation Index in Diffuse Large B-Cell Lymphoma.
-
Sung Shin Park, Joo ryung Huh, Seung Sook Lee, Yun Koo Kang, Dae Seog Heo, Chul Woo Kim
-
Korean J Pathol. 1999;33(7):475-482.
-
-
-
Abstract
PDF
- The diffuse large B-cell lymphoma category of the Revised European American Classification of Lymphoid Neoplasms (REAL) encompasses different morphologic lymphoma subtypes in a single entity, especially the diffuse large cell (DLC) and the immunoblastic (IBL) subtypes by Working Formulation (WF).
The aim of this study is to determine the influence of the morphologic subdivision within this category with respect to clinical outcome and proliferative index using Ki-67 immunostainig combined with image analysis. We retrospectively reviewed 74 patients from 1990 to 1996, who were diagnosed with diffuse large B-cell lymphoma. All cases were reclassified according to REAL and Working Formulation (WF), and Ki-67 immunostaining was performed in all the cases. Fifty-eight cases (78.4%) were classified as DLC and 16 cases (21.6%) as IBL, according to WF. Twenty one cases (28.4%) showed nodal involvement and 53 cases (71.6%), extranodal involvement. All cases were found to display a variable degree of nuclear Ki-67 staining. A proliferative index of 50% or higher identified a group of patients (77%) who had poor clinical results. Overall survival was significantly reduced in these patients displaying high Ki-67 associated proliferative index compared to those with a low proliferative index (p=0.007). 5-year survival estimates were 93% in the low proliferative index group and 55% in the high proliferative index group. A multivariate regression analysis incorporating commonly used clinical prognostic factors confirmed the independent effect of proliferation index on survival.
Moreover, all of the 16 IBL cases showed Ki-67 positivity of 50% or higher, which correlates with the poor clinical outcome compared to 70.7% of DLC (p=0.014). We conclude that subdivision of the diffuse large B-cell lymphoma category of the REAL classification is necessary in terms of prognostic significance in correlation with Ki-67 proliferative index.
- Transthoracic Fine Needle Aspiration Cytology of the Lung .
-
Min Suk Kim, In Ae Park, Sun Hoo Park, Sung Shin Park, Hwal Wong Kim, Kyung Chul Moon, Young Ah Kim, Hye Seung Lee, Ki Wha Park, Jeong wook Seo, Hyun Soon Lee, Eui Keun Ham
-
Korean J Cytopathol. 1999;10(1):13-19.
-
-
-
Abstract
PDF
- The authors analysed 2,653 cases of transthoracic fine needle aspiration cytology of the lung to evaluate the diagnostic accuracy and its limitation. A comparison was made between the original cytologic and the final histologic diagnoses on 1,149 cases from 1,074 patients. A diagnosis of malignancy was established in 38.3% benign in 48.1%, atypical lesion in 2.3%, and inadequate one in 11.9% of the cases. Statistical data on cytologic diagnoses were as follows; specificity 98.9%: sensitivity of procedure, 76.8%: sensitivity of diagnosis, 95.5%: false positive 5 cases: false negative 18 cases: predictive value for malignancy, 98.8%: predictive value for benign lesion, 79.5%: overall diagnostic efficiency, 87.5%: typing accuracy in malignant tumor, 80%.
|
E-submission
